<template>
  <div>
    <!-- 面包屑导航区域 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>商品管理</el-breadcrumb-item>
      <el-breadcrumb-item>添加商品</el-breadcrumb-item>
    </el-breadcrumb>
    <!-- 卡片视图 -->
    <el-card>
      <!-- 提示区 -->
      <el-alert
        title="添加商品信息"
        type="info"
        center
        show-icon
        :closable="false"
      >
      </el-alert>
      <!-- 步骤条 -->
      <el-steps
        :space="200"
        :active="activeIndex - 0"
        finish-status="success"
        align-center
      >
        <el-step title="基本信息"></el-step>
        <el-step title="商品参数"></el-step>
        <el-step title="商品属性"></el-step>
        <el-step title="商品图片"></el-step>
        <el-step title="商品内容"></el-step>
        <el-step title="完成"></el-step>
      </el-steps>
      <!-- tab 栏区域 -->
      <el-form
        :model="addForm"
        :rules="addFormRules"
        ref="addFormRef"
        label-width="100px"
        label-position="top"
      >
        <el-tabs
          v-model="activeIndex"
          tab-position="left"
          :before-leave="beforeTabLeave"
          @tab-click="tabClicked"
        >
          <el-tab-pane label="基本信息" name="0">
            <el-form-item label="商品名称" prop="goods_name">
              <el-input v-model="addForm.goods_name"></el-input>
            </el-form-item>
            <el-form-item label="商品价格" prop="goods_price">
              <el-input v-model="addForm.goods_price" type="number"></el-input>
            </el-form-item>
            <el-form-item label="商品重量" prop="goods_weight">
              <el-input v-model="addForm.goods_weight"></el-input>
            </el-form-item>
            <el-form-item label="商品数量" prop="goods_number">
              <el-input v-model="addForm.goods_number"></el-input>
            </el-form-item>
            <el-form-item label="商品分类" prop="">
              <el-cascader
                v-model="addForm.goods_cat"
                :options="cetelist"
                :props="cateProps"
                @change="handleChange"
              ></el-cascader>
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane label="商品参数" name="1">
            <!-- 渲染表单的 item 项 -->
            <el-form-item
              :label="item.attr_name"
              v-for="item in manyTableData"
              :key="item.attr_id"
            >
              <el-checkbox-group v-model="item.attr_vals">
                <!-- 复选框组 -->
                <el-checkbox
                  :label="cb"
                  v-for="(cb, i) in item.attr_vals"
                  :key="i"
                  border
                ></el-checkbox>
              </el-checkbox-group>
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane label="商品属性" name="2">
            <el-form-item
              :label="item.attr_name"
              v-for="item in onlyTableData"
              :key="item.attr_id"
            >
              <el-input v-model="item.attr_vals"></el-input>
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane label="商品图片" name="3">
            <!-- action 图片上传地址 -->
            <el-upload
              :action="uploadURL"
              :on-preview="handlePreview"
              :on-remove="handleRemove"
              list-type="picture"
              :headers="headeObj"
              :on-success="handlsSuccess"
            >
              <el-button size="small" type="primary">点击上传</el-button>
              <div slot="tip" class="el-upload__tip">
                只能上传jpg/png文件，且不超过500kb
              </div>
            </el-upload>
          </el-tab-pane>
          <el-tab-pane label="商品内容" name="4">
            <!-- 富文本编辑器 -->
            <quill-editor  v-model="addForm.goods_introduce"></quill-editor>
             <!-- 富文本添加按钮 -->
             <el-button type="primary" class="btnAdd" @click="add">添加商品</el-button>
          </el-tab-pane>
        </el-tabs>
      </el-form>
    </el-card>
    <!-- 图片预览 -->
    <el-dialog
      title="图片阅览"
      :visible.sync="previewVisible"
      width="50%"
    >
      <img :src="previewPath" alt="" id="previewImg">
    </el-dialog>
  </div>
</template>

<script>
import _ from 'lodash'

export default {
  data() {
    return {
      activeIndex: '0',
      // 添加商品的表单对象
      addForm: {
        goods_name: '',
        goods_price: 0,
        goods_weight: 0,
        goods_number: 0,
        goods_cat: [],
        pics: [],
        //商品的详情描述
        goods_introduce:'',
        attrs:[]
      },
      addFormRules: {
        goods_name: [
          { required: true, message: '请输入商品名称', trigger: 'blur' },
        ],
        goods_price: [
          { required: true, message: '请输入商品价格', trigger: 'blur' },
        ],
        goods_weight: [
          { required: true, message: '请输入商品重量', trigger: 'blur' },
        ],
        goods_number: [
          { required: true, message: '请输入商品数量', trigger: 'blur' },
        ],
        goods_cat: [
          { required: true, message: '请选中商品分类', trigger: 'blur' },
        ],
      },
      cetelist: [],
      cateProps: {
        label: 'cat_name',
        value: 'cat_id',
        children: 'children',
      },
      //动态参数 列表数据
      manyTableData: [],
      //静态属性 列表数据
      onlyTableData: [],
      //上传图片的URL地址
      uploadURL: 'http://127.0.0.1:8888/api/private/v1/upload',
      //图片上传组件的headers 请求头
      headeObj: {
        Authorization: window.sessionStorage.getItem('token'),
      },
      previewPath: '',
      previewVisible:false
    }
  },
  created() {
    this.getCateList()
  },
  methods: {
    //获取所有商品分类数据
    async getCateList() {
      const { data: res } = await this.$http.get('categories')
      if (res.meta.status != 200)
        return this.$messaeg.error('获取商品分类数据失败！')
      this.cetelist = res.data
    },
    //级联选择器选中项变化，会触发这个函数
    handleChange() {
      if (this.addForm.goods_cat.length !== 3) {
        this.addForm.goods_cat = []
      }
    },
    beforeTabLeave(activeName, oldActiveName) {
      // console.log('即将离开的'+oldActiveName);
      // console.log('即将进入的'+activeName);
      // return false
      if (oldActiveName === '0' && this.addForm.goods_cat.length !== 3) {
        this.$message.error('请选中商品分类！')
        return false
      }
    },
    async tabClicked() {
      // console.log(this.activeIndex);
      if (this.activeIndex === '1') {
        const { data: res } = await this.$http.get(
          `categories/${this.cateId}/attributes`,
          {
            params: { sel: 'many' },
          }
        )
        if (res.meta.status != 200) {
          return this.$message.error('获取动态参数失败！')
        }
        console.log(res.data)
        res.data.forEach((item) => {
          item.attr_vals =
            item.attr_vals.length === 0 ? [] : item.attr_vals.split(' ')
        })
        this.manyTableData = res.data
      } else if (this.activeIndex === '2') {
        const { data: res } = await this.$http.get(
          `categories/${this.cateId}/attributes`,
          {
            params: { sel: 'only' },
          }
        )
        if (res.meta.status != 200) {
          return this.$message.error('获取静态属性失败！')
        }
        console.log(res.data)
        this.onlyTableData = res.data
      }
    },
    //处理图片预览效果
    handlePreview(file) {
      console.log(file)
      this.previewPath = file.response.data.url
      this.previewVisible =true
    },
    //处理图片移除效果
    handleRemove(file) {
      const filePath = file.response.data.tmp_path
      const i = this.addForm.pics.findIndex((x) => x.pic === filePath)
      this.addForm.pics.splice(i, 1)
      console.log(this.addForm)
    },
    //监听图片上传成功
    handlsSuccess(response) {
      console.log(response)
      //拼接得到一个图片的信息对象
      const picInfo = { pic: response.data.tmp_path }
      //将图片信息对象， push到pics数组中
      this.addForm.pics.push(picInfo)
      console.log(this.addForm)
    },
    //添加商品
    add(){
     this.$refs.addFormRef.validate(async valid =>{
       if(!valid){
         return this.$message.error('请添写必要的表单！')
       }
       //执行添加的业务逻辑
       //lodash cloneDeep(obj)
       const form= _.cloneDeep(this.addForm)
       form.goods_cat=
       form.goods_cat.join(',') 
       //处理动态参数
       this.manyTableData.forEach(item=>{
         const newInfo={attr_id:item.attr_id,attr_value:item.attr_vals.join(' ')}
         this.addForm.attrs.push(newInfo)
       })
       //处理静态属性
       this.onlyTableData.forEach(item =>{
         const newInfo={attr_id:item.attr_id,attr_value:item.attr_vals}
       })
       form.attrs=this.addForm.attrs
      //  console.log(form);
      //发起请求 添加商品
      //商品的名称，必须是唯一的
      const {data:res}=await this.$http.post('goods',form)
      console.log(res);
      if(res.meta.status !== 201){
        return this.$message.error('添加商品失败！')
      }
      this.$message.success('添加成功！')
      this.$router.push('/categories')
     })
    }
  },
  computed: {
    cateId() {
      if (this.addForm.goods_cat.length === 3) {
        return this.addForm.goods_cat[2]
      }
      return null
    },
  },
}
</script>

<style lang="less" scoped>
.el-steps {
  margin: 20px;
  justify-content: center;
}
.el-step {
  font-size: 13px;
  flex-grow: 1;
}
.el-checkbox {
  margin: 0;
}
#previewImg{
  width: 100%;
}
.btnAdd{
  margin-top: 15px;
}
</style>